Work-Energy Principle

It refers to activities including force and exercise under the direct influence of power. If you press the object 5 meters in the direction of force, you can work 100 Joules at 20 Newtons.

Ability to work. Like the currency of work, you must have the energy to end the work. To work 100 Joules, you have to consume 100 Joules of energy.

The speed of work and the speed of energy use are the same value. When you finish 100 joules per second (using 100 Joules of energy), the power will be 100 watts.

This fact is called working energy principle and is often a very useful tool for solving mechanical problems. It arises from the application of energy conservation and work and energy, so it does not depend on the law of conservation. In fact, this is a specific application for energy saving. However, as there are many mechanical problems that can be effectively resolved by applying this principle, it requires different attention as the working principle. In the case of a straight collision, the net work done is equal to the average collision force of the collision multiplied by the travel distance during collision.

If the moving object stops due to a collision, extending the stopping distance decreases the average impact force.

Working speed is the same as the speed at which energy is used. This is because one force supplies the energy of one unit when one unit is running. Horsepower is 550 ftb / s, kilowatt is 1000 watts.

The operating principle and kinetic energy (also known as the principle of motion energy) indicate that all the forces acting on the particle (the effect of synthetic force) are equal to the change in kinetic energy of the particle. That is, the workpiece W completed by the resultant force on the particle is equal to the change in the kinetic energy of the particle, and the constraint defines the direction of movement of the particle by ensuring that there is no velocity component in the direction of the constraining force. This also means that the binding force does not increase the instantaneous force. The time integral of the scalar equation generates kinetic energy from the scalar product of instantaneous power and velocity and acceleration. The fact that the principle of motion energy precludes constraints is the foundation of Lagrangian mechanics.

Work is closely related to energy. The principle of motion energy shows that the increase in the kinetic energy of a rigid body is caused by the same amount of aggressive work done on the body by the resultant force acting on its body. Conversely, a decrease in kinetic energy is caused by an equal amount of negative work caused by the resultant force. The effect of the force generated by the potential function is called the potential energy and its power is regarded as conservative. Therefore, the work of an object shifted only in a discreet force field without changing velocity or rotation is equivalent to subtracting the potential energy change of the object.